We'll you're pointing out how ridiculous it is to believe in a free market. Because one has never existed. What ought we subsidize though? Obviously foods that are better for our environment, climate, health, economy and for animal welfare.
Dairy, meat and egg coalitions have known for years that subsidies and marketing are things they need to pursue for greater success, they've used tactics similar to tobacco companies with their marketing and they've used lobbying tactics similar to oil and gas giants as well. It's clear we need to stop subsidizing them.
Eh, I outgrew human milk at a pretty young age actually.